The invention discloses a warning and monitoring fence for protection of a roadside green belt. The warning and monitoring fence comprises a fence body, two transverse rods, supports, rollers, a plurality of first separating plates, reflecting films, rotary shafts, second separating plates, bearings, a fastening knob, indicator lights, a liquid crystal display screen, an electric control box, control buttons, a telescopic shaft and a camera, the two transverse rods are parallelly arranged in the fence body, each transverse rod is connected with the supports in a sliding mode through bearings, and the bearings are arranged in the supports; and the multiple first separating plates are flatly arranged in the fence body, each first separating plate is connected with the corresponding second separating plate in a rotating mode through the rotary shaft, joints of the first separating plates and one ends of the second separating plates are connected with the transverse rods in a sliding mode through the rotary shafts, and the reflecting films are arranged between adjacent rotary shafts on each first separating plates correspondingly. According to the warning and monitoring fence for protection of the roadside green belt, shrinking is conducted between the supports, mutual shrinking is also conducted between the separating plates through the rotary shafts, moving and containing are convenient, and the situation that a car traveling at night runs into the green belt is prevented through the reflecting films on the first separating plates and the indicator lights on the transverse rods.